In case there IS anyone interested, the name is a deliberate misunderstandingon Varusteleka's side. Of course.'Kukko' does mean cock, but in the sense of 'rooster'(at least officially¹). See 'weather cock'.In THIS case, however, it's a variation of the word 'kukkaro', meaning 'purse'. So, it's a 'purse' of bread filled with fish(and should contain bacon or similarpork as well).

¹While that is the official explanation, the Swedish word 'kuk' is a bit TOO similar...and does most emphatically NOT mean 'rooster'....!Stoke Mandeville, Esq & The Victorian Ballsmiths"Nobody Want Verdigris-Covered Balls!"